Muscles dont know 'bodybuilder', 'weightlifter' or 'powerlifter' mate. It depends more on frequency, intensity and volume, but here is a good rule of thumb.

• Working each muscle group once a week: 2-4 sets of 4 exercises per muscle group (2 compounds, 2 isolation)
• Working each muscle group twice a week: 2-4 sets of 3 exercises per muscle group (2 compounds, 1 isolation)
• Working each muscle group three times a week: 2-4 sets of 2 exercises (1 compound, 1 isolation)
• Working each muscle group four times a week: 2-4 sets of 1 exercise (1 compound)